Hi btp
Yoghurt sounds good.
As far as prebiotics go seems like most fruit are good because of phenols.
All berries are specially good.
Nuts seeds and dried fruit (don't go for too much seeds because of omega 6)
Oats
Legumes
Green tea
Red wine (yes!)
Dark chocolate and cocoa (double yes!)
I tend to use a small amount of manuka honey for some sweetness (optional) pureed raspberries or blueberries and sprinkle with cocoa powder
Or I use in my porridge for breakfast or in a curry or a soup. Anything really
Ellie
